Evaluate
\frac{206}{55}\approx 3.745454545
Factor
\frac{2 \cdot 103}{5 \cdot 11} = 3\frac{41}{55} = 3.7454545454545456
Share
Copied to clipboard
\frac{231}{55}-\frac{25}{55}
Least common multiple of 5 and 11 is 55. Convert \frac{21}{5} and \frac{5}{11} to fractions with denominator 55.
\frac{231-25}{55}
Since \frac{231}{55} and \frac{25}{55} have the same denominator, subtract them by subtracting their numerators.
\frac{206}{55}
Subtract 25 from 231 to get 206.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}